Effect of Incorporated Pumping Station Weight on the Rotating Torque of Geokhod Transmission

The article describes the results of a theoretical research of installation of a pumping station into the tail section of a geokhod. It is considered how an increasing weight of the tail section influences power characteristics of geokhod transmission. The research is based on a mathematical model of geokhod's moving through the underground space

Study of Gasdynamic Effect Upon the Weld Geometry When Concumable Electrode Welding

The paper considers the ways of weld geometry controlling when consumable electrode welding under single-jet and double-jet gas shielding. The authors provide comparative results of experimental studies on the effects of shielding gas supply upon the weld geometry in weld joints produced from construction carbon steel 45. It has been established that gas-dynamic effect of the shielding gas has a significant impact upon shaping and weld geometry when consumable electrode welding under double-jet gas shielding

The Influence of Shielding Gas Flow Rate on the Transfer Frequency of Electrode Metals Drops

Chemical composition of weld metal and properties of a joint weld are dominated by the processes occurring in the drop of molten electrode metal and in metal of the weld pool. Under certain conditions in consumable electrode welding with jet gas shielding the drop of electrode metal is influenced significantly both by main forces and the force of gas-dynamic impact of the shielding gas jet. The results of research have revealed that changing rate of shielding gas flow on the nozzle section influences the processes taking place in the welding area. There are changes in the transfer frequency of electrode metal drops and chemical composition of weld metal

Analysis of the Retailoring Methods and the Workability of Deposited Surfaces

This work is devoted to the conduction of the analysis of methods and means of retailoring of parts in the conditions of technical repair facilities as well as of the workability of deposited surfaces. The results of the research show that the most important processing methods of reconditioning of component parts severely worn in the course of exploitation are various ways of deposit welding with subsequent mechanical handling. Furthermore, low efficiency of mechanical handling of retailored parts' surfaces is conditioned on their low workability that results from the specific status of weld pad